Doesn't mean a thing h90, my Thai mother in law hasn't driven a bike in her life, she needs her children to bring her around.
The last time I was in Koh Chang, one of the government officials there told me that, "the busiest place in Koh Chang is the hospital... treating foreigners with serious motorcycle accidents."
The same is true all over Thailand, and they don't joking call a scar from a motorcycle accident a "Thai tattoo" because it is safe to drive here.
This is getting way off topic; but I wanted to chime in to say that if the OP does not want to drive a motorbike in Thailand, for whatever reason, it is their right, and that has nothing to do at all, with scuba instruction. There is nothing wrong with being concerned about personal safety and, in fact, this is a nice compliment to scuba instruction.
What should have happened, in the sad story of this thread, is that the employer should have told the prospective employees about the requirement to ride a motorcycle before agreeing to hire the new instructors. Basically, this story is a sad case of miscommunications; and hopefully everyone has learned a lesson.
Personally, I drive a car in most places and I don't think that makes me a bad person because I prefer to be safer, out of the harsh weather, and with a layer of metal between me and potential accidents. The problem is not "me" or "us"... I grew up riding motorcross as a dirt bike rider and am very confident in my skills; the problem as people find out, time and time, is "the other person" who runs a red light, had a bit too much to drink, or simply is swerving in and out of traffic and hits a motorcycle rider.
Personally, I know a number of good people killed in Thailand riding a motorcycle, and just about everyone who rides one here does have a somewhat serious accident at some point in time. It happens all the time, every day.
It is a matter of personal choice to ride one or not to ride one, and I respect the OP's choice and hope they find suitable employment that meets their requirement not to ride one.